<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>GtkBox: GTK+ 3 Reference Manual</title>
<meta name="generator" content="DocBook XSL Stylesheets Vsnapshot">
<link rel="home" href="index.html" title="GTK+ 3 Reference Manual">
<link rel="up" href="LayoutContainers.html" title="Layout Containers">
<link rel="prev" href="LayoutContainers.html" title="Layout Containers">
<link rel="next" href="GtkGrid.html" title="GtkGrid">
<meta name="generator" content="GTK-Doc V1.33.1 (XML mode)">
<link rel="stylesheet" href="style.css" type="text/css">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="5"><tr valign="middle">
<td width="100%" align="left" class="shortcuts">
<a href="#" class="shortcut">Top</a><span id="nav_description">  <span class="dim">|</span> 
                  <a href="#GtkBox.description" class="shortcut">Description</a></span><span id="nav_hierarchy">  <span class="dim">|</span> 
                  <a href="#GtkBox.object-hierarchy" class="shortcut">Object Hierarchy</a></span><span id="nav_interfaces">  <span class="dim">|</span> 
                  <a href="#GtkBox.implemented-interfaces" class="shortcut">Implemented Interfaces</a></span><span id="nav_properties">  <span class="dim">|</span> 
                  <a href="#GtkBox.properties" class="shortcut">Properties</a></span><span id="nav_child_properties">  <span class="dim">|</span> 
                  <a href="#GtkBox.child-properties" class="shortcut">Child Properties</a></span>
</td>
<td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td>
<td><a accesskey="u" href="LayoutContainers.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td>
<td><a accesskey="p" href="LayoutContainers.html"><img src="left.png" width="16" height="16" border="0" alt="Prev"></a></td>
<td><a accesskey="n" href="GtkGrid.html"><img src="right.png" width="16" height="16" border="0" alt="Next"></a></td>
</tr></table>
<div class="refentry">
<a name="GtkBox"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="GtkBox.top_of_page"></a>GtkBox</span></h2>
<p>GtkBox — A container for packing widgets in a single row or column</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="GtkBox.functions"></a><h2>Functions</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="functions_proto_type">
<col class="functions_proto_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">
<a class="link" href="GtkWidget.html" title="GtkWidget"><span class="returnvalue">GtkWidget</span></a> *
</td>
<td class="function_name">
<a class="link" href="GtkBox.html#gtk-box-new" title="gtk_box_new ()">gtk_box_new</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GtkBox.html#gtk-box-pack-start" title="gtk_box_pack_start ()">gtk_box_pack_start</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GtkBox.html#gtk-box-pack-end" title="gtk_box_pack_end ()">gtk_box_pack_end</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gboolean</span>
</td>
<td class="function_name">
<a class="link" href="GtkBox.html#gtk-box-get-homogeneous" title="gtk_box_get_homogeneous ()">gtk_box_get_homogeneous</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GtkBox.html#gtk-box-set-homogeneous" title="gtk_box_set_homogeneous ()">gtk_box_set_homogeneous</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gint</span>
</td>
<td class="function_name">
<a class="link" href="GtkBox.html#gtk-box-get-spacing" title="gtk_box_get_spacing ()">gtk_box_get_spacing</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GtkBox.html#gtk-box-set-spacing" title="gtk_box_set_spacing ()">gtk_box_set_spacing</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GtkBox.html#gtk-box-reorder-child" title="gtk_box_reorder_child ()">gtk_box_reorder_child</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GtkBox.html#gtk-box-query-child-packing" title="gtk_box_query_child_packing ()">gtk_box_query_child_packing</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GtkBox.html#gtk-box-set-child-packing" title="gtk_box_set_child_packing ()">gtk_box_set_child_packing</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="gtk3-Standard-Enumerations.html#GtkBaselinePosition" title="enum GtkBaselinePosition"><span class="returnvalue">GtkBaselinePosition</span></a>
</td>
<td class="function_name">
<a class="link" href="GtkBox.html#gtk-box-get-baseline-position" title="gtk_box_get_baseline_position ()">gtk_box_get_baseline_position</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GtkBox.html#gtk-box-set-baseline-position" title="gtk_box_set_baseline_position ()">gtk_box_set_baseline_position</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GtkWidget.html" title="GtkWidget"><span class="returnvalue">GtkWidget</span></a> *
</td>
<td class="function_name">
<a class="link" href="GtkBox.html#gtk-box-get-center-widget" title="gtk_box_get_center_widget ()">gtk_box_get_center_widget</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GtkBox.html#gtk-box-set-center-widget" title="gtk_box_set_center_widget ()">gtk_box_set_center_widget</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="GtkBox.properties"></a><h2>Properties</h2>
<div class="informaltable"><table class="informaltable" border="0">
<colgroup>
<col width="150px" class="properties_type">
<col width="300px" class="properties_name">
<col width="200px" class="properties_flags">
</colgroup>
<tbody>
<tr>
<td class="property_type"><a class="link" href="gtk3-Standard-Enumerations.html#GtkBaselinePosition" title="enum GtkBaselinePosition"><span class="type">GtkBaselinePosition</span></a></td>
<td class="property_name"><a class="link" href="GtkBox.html#GtkBox--baseline-position" title="The “baseline-position” property">baseline-position</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<tr>
<td class="property_type"><span class="type">gboolean</span></td>
<td class="property_name"><a class="link" href="GtkBox.html#GtkBox--homogeneous" title="The “homogeneous” property">homogeneous</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<tr>
<td class="property_type"><span class="type">int</span></td>
<td class="property_name"><a class="link" href="GtkBox.html#GtkBox--spacing" title="The “spacing” property">spacing</a></td>
<td class="property_flags">Read / Write</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="GtkBox.child-properties"></a><h2>Child Properties</h2>
<div class="informaltable"><table class="informaltable" border="0">
<colgroup>
<col width="150px" class="child_properties_type">
<col width="300px" class="child_properties_name">
<col width="200px" class="child_properties_flags">
</colgroup>
<tbody>
<tr>
<td class="property_type"><span class="type">gboolean</span></td>
<td class="property_name"><a class="link" href="GtkBox.html#GtkBox--c-expand" title="The “expand” child property">expand</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<tr>
<td class="property_type"><span class="type">gboolean</span></td>
<td class="property_name"><a class="link" href="GtkBox.html#GtkBox--c-fill" title="The “fill” child property">fill</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<tr>
<td class="property_type"><a class="link" href="gtk3-Standard-Enumerations.html#GtkPackType" title="enum GtkPackType"><span class="type">GtkPackType</span></a></td>
<td class="property_name"><a class="link" href="GtkBox.html#GtkBox--c-pack-type" title="The “pack-type” child property">pack-type</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<tr>
<td class="property_type"><span class="type">guint</span></td>
<td class="property_name"><a class="link" href="GtkBox.html#GtkBox--c-padding" title="The “padding” child property">padding</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<tr>
<td class="property_type"><span class="type">int</span></td>
<td class="property_name"><a class="link" href="GtkBox.html#GtkBox--c-position" title="The “position” child property">position</a></td>
<td class="property_flags">Read / Write</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="GtkBox.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="other_proto_type">
<col class="other_proto_name">
</colgroup>
<tbody>
<tr>
<td class="datatype_keyword">struct</td>
<td class="function_name"><a class="link" href="GtkBox.html#GtkBox-struct" title="struct GtkBox">GtkBox</a></td>
</tr>
<tr>
<td class="datatype_keyword">struct</td>
<td class="function_name"><a class="link" href="GtkBox.html#GtkBoxClass" title="struct GtkBoxClass">GtkBoxClass</a></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="GtkBox.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="screen">    GObject
    <span class="lineart">╰──</span> GInitiallyUnowned
        <span class="lineart">╰──</span> <a class="link" href="GtkWidget.html" title="GtkWidget">GtkWidget</a>
            <span class="lineart">╰──</span> <a class="link" href="GtkContainer.html" title="GtkContainer">GtkContainer</a>
                <span class="lineart">╰──</span> GtkBox
                    <span class="lineart">├──</span> <a class="link" href="GtkAppChooserWidget.html" title="GtkAppChooserWidget">GtkAppChooserWidget</a>
                    <span class="lineart">├──</span> <a class="link" href="GtkButtonBox.html" title="GtkButtonBox">GtkButtonBox</a>
                    <span class="lineart">├──</span> <a class="link" href="GtkColorChooserWidget.html" title="GtkColorChooserWidget">GtkColorChooserWidget</a>
                    <span class="lineart">├──</span> <a class="link" href="GtkColorSelection.html" title="GtkColorSelection">GtkColorSelection</a>
                    <span class="lineart">├──</span> <a class="link" href="GtkFileChooserButton.html" title="GtkFileChooserButton">GtkFileChooserButton</a>
                    <span class="lineart">├──</span> <a class="link" href="GtkFileChooserWidget.html" title="GtkFileChooserWidget">GtkFileChooserWidget</a>
                    <span class="lineart">├──</span> <a class="link" href="GtkFontChooserWidget.html" title="GtkFontChooserWidget">GtkFontChooserWidget</a>
                    <span class="lineart">├──</span> <a class="link" href="GtkFontSelection.html" title="GtkFontSelection">GtkFontSelection</a>
                    <span class="lineart">├──</span> <a class="link" href="GtkHBox.html" title="GtkHBox">GtkHBox</a>
                    <span class="lineart">├──</span> <a class="link" href="GtkInfoBar.html" title="GtkInfoBar">GtkInfoBar</a>
                    <span class="lineart">├──</span> <a class="link" href="GtkRecentChooserWidget.html" title="GtkRecentChooserWidget">GtkRecentChooserWidget</a>
                    <span class="lineart">├──</span> <a class="link" href="GtkShortcutsSection.html" title="GtkShortcutsSection">GtkShortcutsSection</a>
                    <span class="lineart">├──</span> <a class="link" href="GtkShortcutsGroup.html" title="GtkShortcutsGroup">GtkShortcutsGroup</a>
                    <span class="lineart">├──</span> <a class="link" href="GtkShortcutsShortcut.html" title="GtkShortcutsShortcut">GtkShortcutsShortcut</a>
                    <span class="lineart">├──</span> <a class="link" href="GtkStackSwitcher.html" title="GtkStackSwitcher">GtkStackSwitcher</a>
                    <span class="lineart">├──</span> <a class="link" href="GtkStatusbar.html" title="GtkStatusbar">GtkStatusbar</a>
                    <span class="lineart">╰──</span> <a class="link" href="GtkVBox.html" title="GtkVBox">GtkVBox</a>
</pre>
</div>
<div class="refsect1">
<a name="GtkBox.implemented-interfaces"></a><h2>Implemented Interfaces</h2>
<p>
GtkBox implements
 AtkImplementorIface,  <a class="link" href="GtkBuildable.html" title="GtkBuildable">GtkBuildable</a> and  <a class="link" href="gtk3-Orientable.html#GtkOrientable">GtkOrientable</a>.</p>
</div>
<div class="refsect1">
<a name="GtkBox.includes"></a><h2>Includes</h2>
<pre class="synopsis">#include &lt;gtk/gtk.h&gt;
</pre>
</div>
<div class="refsect1">
<a name="GtkBox.description"></a><h2>Description</h2>
<p>The GtkBox widget arranges child widgets into a single row or column,
depending upon the value of its <a class="link" href="gtk3-Orientable.html#GtkOrientable--orientation" title="The “orientation” property"><span class="type">“orientation”</span></a> property. Within
the other dimension, all children are allocated the same size. Of course,
the <a class="link" href="GtkWidget.html#GtkWidget--halign" title="The “halign” property"><span class="type">“halign”</span></a> and <a class="link" href="GtkWidget.html#GtkWidget--valign" title="The “valign” property"><span class="type">“valign”</span></a> properties can be used on
the children to influence their allocation.</p>
<p>GtkBox uses a notion of packing. Packing refers
to adding widgets with reference to a particular position in a
<a class="link" href="GtkContainer.html" title="GtkContainer"><span class="type">GtkContainer</span></a>. For a GtkBox, there are two reference positions: the
start and the end of the box.
For a vertical <a class="link" href="GtkBox.html" title="GtkBox"><span class="type">GtkBox</span></a>, the start is defined as the top of the box and
the end is defined as the bottom. For a horizontal <a class="link" href="GtkBox.html" title="GtkBox"><span class="type">GtkBox</span></a> the start
is defined as the left side and the end is defined as the right side.</p>
<p>Use repeated calls to <a class="link" href="GtkBox.html#gtk-box-pack-start" title="gtk_box_pack_start ()"><code class="function">gtk_box_pack_start()</code></a> to pack widgets into a
GtkBox from start to end. Use <a class="link" href="GtkBox.html#gtk-box-pack-end" title="gtk_box_pack_end ()"><code class="function">gtk_box_pack_end()</code></a> to add widgets from
end to start. You may intersperse these calls and add widgets from
both ends of the same GtkBox.</p>
<p>Because GtkBox is a <a class="link" href="GtkContainer.html" title="GtkContainer"><span class="type">GtkContainer</span></a>, you may also use <a class="link" href="GtkContainer.html#gtk-container-add" title="gtk_container_add ()"><code class="function">gtk_container_add()</code></a>
to insert widgets into the box, and they will be packed with the default
values for expand and fill child properties. Use <a class="link" href="GtkContainer.html#gtk-container-remove" title="gtk_container_remove ()"><code class="function">gtk_container_remove()</code></a>
to remove widgets from the GtkBox.</p>
<p>Use <a class="link" href="GtkBox.html#gtk-box-set-homogeneous" title="gtk_box_set_homogeneous ()"><code class="function">gtk_box_set_homogeneous()</code></a> to specify whether or not all children
of the GtkBox are forced to get the same amount of space.</p>
<p>Use <a class="link" href="GtkBox.html#gtk-box-set-spacing" title="gtk_box_set_spacing ()"><code class="function">gtk_box_set_spacing()</code></a> to determine how much space will be
minimally placed between all children in the GtkBox. Note that
spacing is added between the children, while
padding added by <a class="link" href="GtkBox.html#gtk-box-pack-start" title="gtk_box_pack_start ()"><code class="function">gtk_box_pack_start()</code></a> or <a class="link" href="GtkBox.html#gtk-box-pack-end" title="gtk_box_pack_end ()"><code class="function">gtk_box_pack_end()</code></a> is added
on either side of the widget it belongs to.</p>
<p>Use <a class="link" href="GtkBox.html#gtk-box-reorder-child" title="gtk_box_reorder_child ()"><code class="function">gtk_box_reorder_child()</code></a> to move a GtkBox child to a different
place in the box.</p>
<p>Use <a class="link" href="GtkBox.html#gtk-box-set-child-packing" title="gtk_box_set_child_packing ()"><code class="function">gtk_box_set_child_packing()</code></a> to reset the expand,
fill and padding child properties.
Use <a class="link" href="GtkBox.html#gtk-box-query-child-packing" title="gtk_box_query_child_packing ()"><code class="function">gtk_box_query_child_packing()</code></a> to query these fields.</p>
<div class="refsect2">
<a name="id-1.3.7.2.10.10"></a><h3>CSS nodes</h3>
<p>GtkBox uses a single CSS node with name box.</p>
<p>In horizontal orientation, the nodes of the children are always arranged
from left to right. So :first-child will always select the leftmost child,
regardless of text direction.</p>
</div>
</div>
<div class="refsect1">
<a name="GtkBox.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="gtk-box-new"></a><h3>gtk_box_new ()</h3>
<pre class="programlisting"><a class="link" href="GtkWidget.html" title="GtkWidget"><span class="returnvalue">GtkWidget</span></a> *
gtk_box_new (<em class="parameter"><code><a class="link" href="gtk3-Standard-Enumerations.html#GtkOrientation" title="enum GtkOrientation"><span class="type">GtkOrientation</span></a> orientation</code></em>,
             <em class="parameter"><code><span class="type">gint</span> spacing</code></em>);</pre>
<p>Creates a new <a class="link" href="GtkBox.html" title="GtkBox"><span class="type">GtkBox</span></a>.</p>
<div class="refsect3">
<a name="gtk-box-new.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>orientation</p></td>
<td class="parameter_description"><p>the box’s orientation.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>spacing</p></td>
<td class="parameter_description"><p>the number of pixels to place by default between children.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gtk-box-new.returns"></a><h4>Returns</h4>
<p> a new <a class="link" href="GtkBox.html" title="GtkBox"><span class="type">GtkBox</span></a>.</p>
</div>
<p class="since">Since: <a class="link" href="api-index-3-0.html#api-index-3.0">3.0</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gtk-box-pack-start"></a><h3>gtk_box_pack_start ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gtk_box_pack_start (<em class="parameter"><code><a class="link" href="GtkBox.html" title="GtkBox"><span class="type">GtkBox</span></a> *box</code></em>,
                    <em class="parameter"><code><a class="link" href="GtkWidget.html" title="GtkWidget"><span class="type">GtkWidget</span></a> *child</code></em>,
                    <em class="parameter"><code><span class="type">gboolean</span> expand</code></em>,
                    <em class="parameter"><code><span class="type">gboolean</span> fill</code></em>,
                    <em class="parameter"><code><span class="type">guint</span> padding</code></em>);</pre>
<p>Adds <em class="parameter"><code>child</code></em>
 to <em class="parameter"><code>box</code></em>
, packed with reference to the start of <em class="parameter"><code>box</code></em>
.
The <em class="parameter"><code>child</code></em>
 is packed after any other child packed with reference
to the start of <em class="parameter"><code>box</code></em>
.</p>
<div class="refsect3">
<a name="gtk-box-pack-start.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>box</p></td>
<td class="parameter_description"><p>a <a class="link" href="GtkBox.html" title="GtkBox"><span class="type">GtkBox</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>child</p></td>
<td class="parameter_description"><p>the <a class="link" href="GtkWidget.html" title="GtkWidget"><span class="type">GtkWidget</span></a> to be added to <em class="parameter"><code>box</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>expand</p></td>
<td class="parameter_description"><p><code class="literal">TRUE</code> if the new child is to be given extra space allocated
to <em class="parameter"><code>box</code></em>
. The extra space will be divided evenly between all children
that use this option</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>fill</p></td>
<td class="parameter_description"><p><code class="literal">TRUE</code> if space given to <em class="parameter"><code>child</code></em>
by the <em class="parameter"><code>expand</code></em>
option is
actually allocated to <em class="parameter"><code>child</code></em>
, rather than just padding it.  This
parameter has no effect if <em class="parameter"><code>expand</code></em>
is set to <code class="literal">FALSE</code>.  A child is
always allocated the full height of a horizontal <a class="link" href="GtkBox.html" title="GtkBox"><span class="type">GtkBox</span></a> and the full width
of a vertical <a class="link" href="GtkBox.html" title="GtkBox"><span class="type">GtkBox</span></a>. This option affects the other dimension</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>padding</p></td>
<td class="parameter_description"><p>extra space in pixels to put between this child and its
neighbors, over and above the global amount specified by
<a class="link" href="GtkBox.html#GtkBox--spacing" title="The “spacing” property"><span class="type">“spacing”</span></a> property.  If <em class="parameter"><code>child</code></em>
is a widget at one of the
reference ends of <em class="parameter"><code>box</code></em>
, then <em class="parameter"><code>padding</code></em>
pixels are also put between
<em class="parameter"><code>child</code></em>
and the reference edge of <em class="parameter"><code>box</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gtk-box-pack-end"></a><h3>gtk_box_pack_end ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gtk_box_pack_end (<em class="parameter"><code><a class="link" href="GtkBox.html" title="GtkBox"><span class="type">GtkBox</span></a> *box</code></em>,
                  <em class="parameter"><code><a class="link" href="GtkWidget.html" title="GtkWidget"><span class="type">GtkWidget</span></a> *child</code></em>,
                  <em class="parameter"><code><span class="type">gboolean</span> expand</code></em>,
                  <em class="parameter"><code><span class="type">gboolean</span> fill</code></em>,
                  <em class="parameter"><code><span class="type">guint</span> padding</code></em>);</pre>
<p>Adds <em class="parameter"><code>child</code></em>
 to <em class="parameter"><code>box</code></em>
, packed with reference to the end of <em class="parameter"><code>box</code></em>
.
The <em class="parameter"><code>child</code></em>
 is packed after (away from end of) any other child
packed with reference to the end of <em class="parameter"><code>box</code></em>
.</p>
<div class="refsect3">
<a name="gtk-box-pack-end.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>box</p></td>
<td class="parameter_description"><p>a <a class="link" href="GtkBox.html" title="GtkBox"><span class="type">GtkBox</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>child</p></td>
<td class="parameter_description"><p>the <a class="link" href="GtkWidget.html" title="GtkWidget"><span class="type">GtkWidget</span></a> to be added to <em class="parameter"><code>box</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>expand</p></td>
<td class="parameter_description"><p><code class="literal">TRUE</code> if the new child is to be given extra space allocated
to <em class="parameter"><code>box</code></em>
. The extra space will be divided evenly between all children
of <em class="parameter"><code>box</code></em>
that use this option</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>fill</p></td>
<td class="parameter_description"><p><code class="literal">TRUE</code> if space given to <em class="parameter"><code>child</code></em>
by the <em class="parameter"><code>expand</code></em>
option is
actually allocated to <em class="parameter"><code>child</code></em>
, rather than just padding it.  This
parameter has no effect if <em class="parameter"><code>expand</code></em>
is set to <code class="literal">FALSE</code>.  A child is
always allocated the full height of a horizontal <a class="link" href="GtkBox.html" title="GtkBox"><span class="type">GtkBox</span></a> and the full width
of a vertical <a class="link" href="GtkBox.html" title="GtkBox"><span class="type">GtkBox</span></a>.  This option affects the other dimension</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>padding</p></td>
<td class="parameter_description"><p>extra space in pixels to put between this child and its
neighbors, over and above the global amount specified by
<a class="link" href="GtkBox.html#GtkBox--spacing" title="The “spacing” property"><span class="type">“spacing”</span></a> property.  If <em class="parameter"><code>child</code></em>
is a widget at one of the
reference ends of <em class="parameter"><code>box</code></em>
, then <em class="parameter"><code>padding</code></em>
pixels are also put between
<em class="parameter"><code>child</code></em>
and the reference edge of <em class="parameter"><code>box</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gtk-box-get-homogeneous"></a><h3>gtk_box_get_homogeneous ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
gtk_box_get_homogeneous (<em class="parameter"><code><a class="link" href="GtkBox.html" title="GtkBox"><span class="type">GtkBox</span></a> *box</code></em>);</pre>
<p>Returns whether the box is homogeneous (all children are the
same size). See <a class="link" href="GtkBox.html#gtk-box-set-homogeneous" title="gtk_box_set_homogeneous ()"><code class="function">gtk_box_set_homogeneous()</code></a>.</p>
<div class="refsect3">
<a name="gtk-box-get-homogeneous.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>box</p></td>
<td class="parameter_description"><p>a <a class="link" href="GtkBox.html" title="GtkBox"><span class="type">GtkBox</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gtk-box-get-homogeneous.returns"></a><h4>Returns</h4>
<p> <code class="literal">TRUE</code> if the box is homogeneous.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gtk-box-set-homogeneous"></a><h3>gtk_box_set_homogeneous ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gtk_box_set_homogeneous (<em class="parameter"><code><a class="link" href="GtkBox.html" title="GtkBox"><span class="type">GtkBox</span></a> *box</code></em>,
                         <em class="parameter"><code><span class="type">gboolean</span> homogeneous</code></em>);</pre>
<p>Sets the <a class="link" href="GtkBox.html#GtkBox--homogeneous" title="The “homogeneous” property"><span class="type">“homogeneous”</span></a> property of <em class="parameter"><code>box</code></em>
, controlling
whether or not all children of <em class="parameter"><code>box</code></em>
 are given equal space
in the box.</p>
<div class="refsect3">
<a name="gtk-box-set-homogeneous.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>box</p></td>
<td class="parameter_description"><p>a <a class="link" href="GtkBox.html" title="GtkBox"><span class="type">GtkBox</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>homogeneous</p></td>
<td class="parameter_description"><p>a boolean value, <code class="literal">TRUE</code> to create equal allotments,
<code class="literal">FALSE</code> for variable allotments</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gtk-box-get-spacing"></a><h3>gtk_box_get_spacing ()</h3>
<pre class="programlisting"><span class="returnvalue">gint</span>
gtk_box_get_spacing (<em class="parameter"><code><a class="link" href="GtkBox.html" title="GtkBox"><span class="type">GtkBox</span></a> *box</code></em>);</pre>
<p>Gets the value set by <a class="link" href="GtkBox.html#gtk-box-set-spacing" title="gtk_box_set_spacing ()"><code class="function">gtk_box_set_spacing()</code></a>.</p>
<div class="refsect3">
<a name="gtk-box-get-spacing.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>box</p></td>
<td class="parameter_description"><p>a <a class="link" href="GtkBox.html" title="GtkBox"><span class="type">GtkBox</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gtk-box-get-spacing.returns"></a><h4>Returns</h4>
<p> spacing between children</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gtk-box-set-spacing"></a><h3>gtk_box_set_spacing ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gtk_box_set_spacing (<em class="parameter"><code><a class="link" href="GtkBox.html" title="GtkBox"><span class="type">GtkBox</span></a> *box</code></em>,
                     <em class="parameter"><code><span class="type">gint</span> spacing</code></em>);</pre>
<p>Sets the <a class="link" href="GtkBox.html#GtkBox--spacing" title="The “spacing” property"><span class="type">“spacing”</span></a> property of <em class="parameter"><code>box</code></em>
, which is the
number of pixels to place between children of <em class="parameter"><code>box</code></em>
.</p>
<div class="refsect3">
<a name="gtk-box-set-spacing.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>box</p></td>
<td class="parameter_description"><p>a <a class="link" href="GtkBox.html" title="GtkBox"><span class="type">GtkBox</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>spacing</p></td>
<td class="parameter_description"><p>the number of pixels to put between children</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gtk-box-reorder-child"></a><h3>gtk_box_reorder_child ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gtk_box_reorder_child (<em class="parameter"><code><a class="link" href="GtkBox.html" title="GtkBox"><span class="type">GtkBox</span></a> *box</code></em>,
                       <em class="parameter"><code><a class="link" href="GtkWidget.html" title="GtkWidget"><span class="type">GtkWidget</span></a> *child</code></em>,
                       <em class="parameter"><code><span class="type">gint</span> position</code></em>);</pre>
<p>Moves <em class="parameter"><code>child</code></em>
 to a new <em class="parameter"><code>position</code></em>
 in the list of <em class="parameter"><code>box</code></em>
 children.
The list contains widgets packed <a class="link" href="gtk3-Standard-Enumerations.html#GTK-PACK-START:CAPS"><span class="type">GTK_PACK_START</span></a>
as well as widgets packed <a class="link" href="gtk3-Standard-Enumerations.html#GTK-PACK-END:CAPS"><span class="type">GTK_PACK_END</span></a>, in the order that these
widgets were added to <em class="parameter"><code>box</code></em>
.</p>
<p>A widget’s position in the <em class="parameter"><code>box</code></em>
 children list determines where
the widget is packed into <em class="parameter"><code>box</code></em>
.  A child widget at some position
in the list will be packed just after all other widgets of the
same packing type that appear earlier in the list.</p>
<div class="refsect3">
<a name="gtk-box-reorder-child.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>box</p></td>
<td class="parameter_description"><p>a <a class="link" href="GtkBox.html" title="GtkBox"><span class="type">GtkBox</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>child</p></td>
<td class="parameter_description"><p>the <a class="link" href="GtkWidget.html" title="GtkWidget"><span class="type">GtkWidget</span></a> to move</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>position</p></td>
<td class="parameter_description"><p>the new position for <em class="parameter"><code>child</code></em>
in the list of children
of <em class="parameter"><code>box</code></em>
, starting from 0. If negative, indicates the end of
the list</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gtk-box-query-child-packing"></a><h3>gtk_box_query_child_packing ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gtk_box_query_child_packing (<em class="parameter"><code><a class="link" href="GtkBox.html" title="GtkBox"><span class="type">GtkBox</span></a> *box</code></em>,
                             <em class="parameter"><code><a class="link" href="GtkWidget.html" title="GtkWidget"><span class="type">GtkWidget</span></a> *child</code></em>,
                             <em class="parameter"><code><span class="type">gboolean</span> *expand</code></em>,
                             <em class="parameter"><code><span class="type">gboolean</span> *fill</code></em>,
                             <em class="parameter"><code><span class="type">guint</span> *padding</code></em>,
                             <em class="parameter"><code><a class="link" href="gtk3-Standard-Enumerations.html#GtkPackType" title="enum GtkPackType"><span class="type">GtkPackType</span></a> *pack_type</code></em>);</pre>
<p>Obtains information about how <em class="parameter"><code>child</code></em>
 is packed into <em class="parameter"><code>box</code></em>
.</p>
<div class="refsect3">
<a name="gtk-box-query-child-packing.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>box</p></td>
<td class="parameter_description"><p>a <a class="link" href="GtkBox.html" title="GtkBox"><span class="type">GtkBox</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>child</p></td>
<td class="parameter_description"><p>the <a class="link" href="GtkWidget.html" title="GtkWidget"><span class="type">GtkWidget</span></a> of the child to query</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>expand</p></td>
<td class="parameter_description"><p>pointer to return location for expand child
property. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>fill</p></td>
<td class="parameter_description"><p>pointer to return location for fill child
property. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>padding</p></td>
<td class="parameter_description"><p>pointer to return location for padding
child property. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>pack_type</p></td>
<td class="parameter_description"><p>pointer to return location for pack-type
child property. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gtk-box-set-child-packing"></a><h3>gtk_box_set_child_packing ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gtk_box_set_child_packing (<em class="parameter"><code><a class="link" href="GtkBox.html" title="GtkBox"><span class="type">GtkBox</span></a> *box</code></em>,
                           <em class="parameter"><code><a class="link" href="GtkWidget.html" title="GtkWidget"><span class="type">GtkWidget</span></a> *child</code></em>,
                           <em class="parameter"><code><span class="type">gboolean</span> expand</code></em>,
                           <em class="parameter"><code><span class="type">gboolean</span> fill</code></em>,
                           <em class="parameter"><code><span class="type">guint</span> padding</code></em>,
                           <em class="parameter"><code><a class="link" href="gtk3-Standard-Enumerations.html#GtkPackType" title="enum GtkPackType"><span class="type">GtkPackType</span></a> pack_type</code></em>);</pre>
<p>Sets the way <em class="parameter"><code>child</code></em>
 is packed into <em class="parameter"><code>box</code></em>
.</p>
<div class="refsect3">
<a name="gtk-box-set-child-packing.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>box</p></td>
<td class="parameter_description"><p>a <a class="link" href="GtkBox.html" title="GtkBox"><span class="type">GtkBox</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>child</p></td>
<td class="parameter_description"><p>the <a class="link" href="GtkWidget.html" title="GtkWidget"><span class="type">GtkWidget</span></a> of the child to set</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>expand</p></td>
<td class="parameter_description"><p>the new value of the expand child property</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>fill</p></td>
<td class="parameter_description"><p>the new value of the fill child property</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>padding</p></td>
<td class="parameter_description"><p>the new value of the padding child property</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>pack_type</p></td>
<td class="parameter_description"><p>the new value of the pack-type child property</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gtk-box-get-baseline-position"></a><h3>gtk_box_get_baseline_position ()</h3>
<pre class="programlisting"><a class="link" href="gtk3-Standard-Enumerations.html#GtkBaselinePosition" title="enum GtkBaselinePosition"><span class="returnvalue">GtkBaselinePosition</span></a>
gtk_box_get_baseline_position (<em class="parameter"><code><a class="link" href="GtkBox.html" title="GtkBox"><span class="type">GtkBox</span></a> *box</code></em>);</pre>
<p>Gets the value set by <a class="link" href="GtkBox.html#gtk-box-set-baseline-position" title="gtk_box_set_baseline_position ()"><code class="function">gtk_box_set_baseline_position()</code></a>.</p>
<div class="refsect3">
<a name="gtk-box-get-baseline-position.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>box</p></td>
<td class="parameter_description"><p>a <a class="link" href="GtkBox.html" title="GtkBox"><span class="type">GtkBox</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gtk-box-get-baseline-position.returns"></a><h4>Returns</h4>
<p> the baseline position</p>
</div>
<p class="since">Since: <a class="link" href="api-index-3-10.html#api-index-3.10">3.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gtk-box-set-baseline-position"></a><h3>gtk_box_set_baseline_position ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gtk_box_set_baseline_position (<em class="parameter"><code><a class="link" href="GtkBox.html" title="GtkBox"><span class="type">GtkBox</span></a> *box</code></em>,
                               <em class="parameter"><code><a class="link" href="gtk3-Standard-Enumerations.html#GtkBaselinePosition" title="enum GtkBaselinePosition"><span class="type">GtkBaselinePosition</span></a> position</code></em>);</pre>
<p>Sets the baseline position of a box. This affects
only horizontal boxes with at least one baseline aligned
child. If there is more vertical space available than requested,
and the baseline is not allocated by the parent then
<em class="parameter"><code>position</code></em>
 is used to allocate the baseline wrt the
extra space available.</p>
<div class="refsect3">
<a name="gtk-box-set-baseline-position.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>box</p></td>
<td class="parameter_description"><p>a <a class="link" href="GtkBox.html" title="GtkBox"><span class="type">GtkBox</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>position</p></td>
<td class="parameter_description"><p>a <a class="link" href="gtk3-Standard-Enumerations.html#GtkBaselinePosition" title="enum GtkBaselinePosition"><span class="type">GtkBaselinePosition</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-3-10.html#api-index-3.10">3.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gtk-box-get-center-widget"></a><h3>gtk_box_get_center_widget ()</h3>
<pre class="programlisting"><a class="link" href="GtkWidget.html" title="GtkWidget"><span class="returnvalue">GtkWidget</span></a> *
gtk_box_get_center_widget (<em class="parameter"><code><a class="link" href="GtkBox.html" title="GtkBox"><span class="type">GtkBox</span></a> *box</code></em>);</pre>
<p>Retrieves the center widget of the box.</p>
<div class="refsect3">
<a name="gtk-box-get-center-widget.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>box</p></td>
<td class="parameter_description"><p>a <a class="link" href="GtkBox.html" title="GtkBox"><span class="type">GtkBox</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gtk-box-get-center-widget.returns"></a><h4>Returns</h4>
<p>the center widget
or <code class="literal">NULL</code> in case no center widget is set. </p>
<p><span class="annotation">[<acronym title="The data is owned by the callee, which is responsible of freeing it."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="api-index-3-12.html#api-index-3.12">3.12</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gtk-box-set-center-widget"></a><h3>gtk_box_set_center_widget ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gtk_box_set_center_widget (<em class="parameter"><code><a class="link" href="GtkBox.html" title="GtkBox"><span class="type">GtkBox</span></a> *box</code></em>,
                           <em class="parameter"><code><a class="link" href="GtkWidget.html" title="GtkWidget"><span class="type">GtkWidget</span></a> *widget</code></em>);</pre>
<p>Sets a center widget; that is a child widget that will be
centered with respect to the full width of the box, even
if the children at either side take up different amounts
of space.</p>
<div class="refsect3">
<a name="gtk-box-set-center-widget.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>box</p></td>
<td class="parameter_description"><p>a <a class="link" href="GtkBox.html" title="GtkBox"><span class="type">GtkBox</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>widget</p></td>
<td class="parameter_description"><p>the widget to center. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-3-12.html#api-index-3.12">3.12</a></p>
</div>
</div>
<div class="refsect1">
<a name="GtkBox.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="GtkBox-struct"></a><h3>struct GtkBox</h3>
<pre class="programlisting">struct GtkBox;</pre>
</div>
<hr>
<div class="refsect2">
<a name="GtkBoxClass"></a><h3>struct GtkBoxClass</h3>
<pre class="programlisting">struct GtkBoxClass {
  GtkContainerClass parent_class;
};
</pre>
<div class="refsect3">
<a name="GtkBoxClass.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="struct_members_name">
<col class="struct_members_description">
<col width="200px" class="struct_members_annotations">
</colgroup>
<tbody></tbody>
</table></div>
</div>
</div>
</div>
<div class="refsect1">
<a name="GtkBox.property-details"></a><h2>Property Details</h2>
<div class="refsect2">
<a name="GtkBox--baseline-position"></a><h3>The <code class="literal">“baseline-position”</code> property</h3>
<pre class="programlisting">  “baseline-position”        <a class="link" href="gtk3-Standard-Enumerations.html#GtkBaselinePosition" title="enum GtkBaselinePosition"><span class="type">GtkBaselinePosition</span></a></pre>
<p>The position of the baseline aligned widgets if extra space is available.</p>
<p>Owner: GtkBox</p>
<p>Flags: Read / Write</p>
<p>Default value: GTK_BASELINE_POSITION_CENTER</p>
</div>
<hr>
<div class="refsect2">
<a name="GtkBox--homogeneous"></a><h3>The <code class="literal">“homogeneous”</code> property</h3>
<pre class="programlisting">  “homogeneous”              <span class="type">gboolean</span></pre>
<p>Whether the children should all be the same size.</p>
<p>Owner: GtkBox</p>
<p>Flags: Read / Write</p>
<p>Default value: FALSE</p>
</div>
<hr>
<div class="refsect2">
<a name="GtkBox--spacing"></a><h3>The <code class="literal">“spacing”</code> property</h3>
<pre class="programlisting">  “spacing”                  <span class="type">int</span></pre>
<p>The amount of space between children.</p>
<p>Owner: GtkBox</p>
<p>Flags: Read / Write</p>
<p>Allowed values: &gt;= 0</p>
<p>Default value: 0</p>
</div>
</div>
<div class="refsect1">
<a name="GtkBox.child-property-details"></a><h2>Child Property Details</h2>
<div class="refsect2">
<a name="GtkBox--c-expand"></a><h3>The <code class="literal">“expand”</code> child property</h3>
<pre class="programlisting">  “expand”                   <span class="type">gboolean</span></pre>
<p>Whether the child should receive extra space when the parent grows.</p>
<p>Note that the default value for this property is <code class="literal">FALSE</code> for GtkBox,
but <a class="link" href="GtkHBox.html" title="GtkHBox"><span class="type">GtkHBox</span></a>, <a class="link" href="GtkVBox.html" title="GtkVBox"><span class="type">GtkVBox</span></a> and other subclasses use the old default
of <code class="literal">TRUE</code>.</p>
<p>Note: The <a class="link" href="GtkWidget.html#GtkWidget--hexpand" title="The “hexpand” property"><span class="type">“hexpand”</span></a> or <a class="link" href="GtkWidget.html#GtkWidget--vexpand" title="The “vexpand” property"><span class="type">“vexpand”</span></a> properties are the
preferred way to influence whether the child receives extra space, by
setting the child’s expand property corresponding to the box’s orientation.</p>
<p>In contrast to <a class="link" href="GtkWidget.html#GtkWidget--hexpand" title="The “hexpand” property"><span class="type">“hexpand”</span></a>, the expand child property does
not cause the box to expand itself.</p>
<p>Owner: GtkBox</p>
<p>Flags: Read / Write</p>
<p>Default value: FALSE</p>
</div>
<hr>
<div class="refsect2">
<a name="GtkBox--c-fill"></a><h3>The <code class="literal">“fill”</code> child property</h3>
<pre class="programlisting">  “fill”                     <span class="type">gboolean</span></pre>
<p>Whether the child should fill extra space or use it as padding.</p>
<p>Note: The <a class="link" href="GtkWidget.html#GtkWidget--halign" title="The “halign” property"><span class="type">“halign”</span></a> or <a class="link" href="GtkWidget.html#GtkWidget--valign" title="The “valign” property"><span class="type">“valign”</span></a> properties are the
preferred way to influence whether the child fills available space, by
setting the child’s align property corresponding to the box’s orientation
to <a class="link" href="GtkWidget.html#GTK-ALIGN-FILL:CAPS"><code class="literal">GTK_ALIGN_FILL</code></a> to fill, or to something else to refrain from filling.</p>
<p>Owner: GtkBox</p>
<p>Flags: Read / Write</p>
<p>Default value: TRUE</p>
</div>
<hr>
<div class="refsect2">
<a name="GtkBox--c-pack-type"></a><h3>The <code class="literal">“pack-type”</code> child property</h3>
<pre class="programlisting">  “pack-type”                <a class="link" href="gtk3-Standard-Enumerations.html#GtkPackType" title="enum GtkPackType"><span class="type">GtkPackType</span></a></pre>
<p>A GtkPackType indicating whether the child is packed with reference to the start or end of the parent.</p>
<p>Owner: GtkBox</p>
<p>Flags: Read / Write</p>
<p>Default value: GTK_PACK_START</p>
</div>
<hr>
<div class="refsect2">
<a name="GtkBox--c-padding"></a><h3>The <code class="literal">“padding”</code> child property</h3>
<pre class="programlisting">  “padding”                  <span class="type">guint</span></pre>
<p>Extra space to put between the child and its neighbors, in pixels.</p>
<p>Note: The CSS padding properties are the preferred way to add space among
widgets, by setting the paddings corresponding to the box’s orientation.</p>
<p>Owner: GtkBox</p>
<p>Flags: Read / Write</p>
<p>Allowed values: &lt;= G_MAXINT</p>
<p>Default value: 0</p>
</div>
<hr>
<div class="refsect2">
<a name="GtkBox--c-position"></a><h3>The <code class="literal">“position”</code> child property</h3>
<pre class="programlisting">  “position”                 <span class="type">int</span></pre>
<p>The index of the child in the parent.</p>
<p>Owner: GtkBox</p>
<p>Flags: Read / Write</p>
<p>Allowed values: &gt;= -1</p>
<p>Default value: 0</p>
</div>
</div>
<div class="refsect1">
<a name="GtkBox.see-also"></a><h2>See Also</h2>
<p><a class="link" href="GtkGrid.html" title="GtkGrid"><span class="type">GtkGrid</span></a></p>
</div>
</div>
<div class="footer">
<hr>Generated by GTK-Doc V1.33.1</div>
</body>
</html>